TenantTabs limited LGPL component replacement permission
Published TenantTabs 1.0.0: replacement rights in vendor/NOTICE.txt

TenantTabs' original application code remains proprietary. For a TenantTabs copy
lawfully received under an authorised distribution,
the publisher permits the recipient, to the extent required by LGPLv3, to:
- modify or replace the LGPL-covered ExtPay component;
- use the supplied application code/materials to recombine or relink TenantTabs
  with an interface-compatible modified version of that component;
- install and execute the resulting combination; and
- reverse engineer the combination as necessary to debug those library changes.

These permissions prevail over conflicting TenantTabs terms to that extent.
ExtPay and other third-party components retain their respective licence rights;
this notice does not restrict those rights. No general open-source licence or
additional proprietary application redistribution permission is granted beyond
what the applicable licences require. No publisher AMO account, signing authority,
payment-service entitlement or credential is granted by this permission.

The published Firefox 1.0.0 XPI carries these permissions in vendor/NOTICE.txt;
they are not conditional on future adoption of this separate document. The listing
has no separate EULA. This notice does not grant permission to publish additional
proprietary application materials or constitute legal certification.